Apparatus for reproducing maps and charts.



I No. 666,788. Patented Jan. 29, IQOL EQABERLL APPARATUS FOR BEPRODUCENGMAPS AND CHARTS.

(Application filed ikpr. 5, 1900.|

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WITNESSES: X INVENTOR A J WMQ m 3 avg ATTORNEYS UNITED STATES PATENTOsman.

EDWARD ABERLI, or BUFFALO, NEW YORK.

APPARATUS FOR REPRO'DUCING MAPS AND CHARTE.

MEDICATION forming part of Letters Patent No. 566,788, dated January 29,1901. Application filed April 5, 1900. Serial-No. 11.565. (No model-J Toall whom zit may concern.-

Be it known that I, EDWARD ABERLI, a citizen of the United States,residing at Buffalo, Erie county, State of New York, have inventedcertain new and useful Improvements in Apparatus for Reproducing Mapsand Charts, of which the following is a specification.

Heretofore in the reproduction of maps and charts it has been customaryto employ several engraved stones, each of which embodies some of thefeatures contained in the finished map or chart. Thus, for instance, ithas been common to engrave the ground plan of the map on one stone,to'engrave the designations of streets, &c., on a second stone, and toengrave the railroads on a third stone, and then cause each map to beprinted three times, once from each stone. Aside from the fact that thisis a very diflicult and expensive process it has beeufonnd in practiceto be almost impossible to obtain perfect registry of the va riousimprints upon a single sheet, and these difficulties in the reproductionof maps and charts by this method have long been understood anddeplored.

The object of my present invention is to overcome these and otherdifficultiesinherent in Figs. land 2 superposed.

in methods for reproducing maps and charts heretofore employed and toprovide an inexpensive and efficient apparatus for reproducing maps andcharts whereby much time will be saved in such reproduction and asuperior article produced wherein perfect registration will be provided.

To these ends my invention consists in the new and improved apparatusfor reproducing maps and charts, to be hereinafter described andclaimed.

' In order that the invention may be readily understood, reference ismade to the accompanying drawings, wherein-- Figure l is a ground planof a map-say, for example, the city of New York. Fig. 2 is a view of aseparate chart, showing only the elevated roads in the city of New York.

Fig. 3 is a-view showing the maps illustrated Fig. 4 is a section of thestructure shown in Fig. 3, the sheets being of exaggerated thickness.

In accordance with my invention a groundplan map or chart A, withstreets a, &c., is

first made upon some suitable transparent material, such as celluloid.second aunil iary map or chartB (or as many as may he desired) is thenprepared .in a like manner upon a suitable transparentmaterial, such ascelluloid. Each of these auxiliary charts contains only the matter to beadded to the ground-plan map. Thus, for instance, the auxiliary chart B(represented in Fig. of the drawings) merely illustrates the elevatedand steam railroads h in the city of New York. The designation 0(represented in Fig. 3)-is shown as produced upon a third transparentchart 0, merely having such dos ignations. The plurality of charts ormaps should be so constructed that the different markings'on each of thesheets may be read ily brought into proper relation to the markings onthe other sheets in order that when superposed the whole'will present acomplete map, with the characters upon the auxiliary map or mapsappearing in the proper position upon the -ground plan and a perfectregister being given. 'A simple manner in which to achieve this end isto make all of the transparent sheets of exactly the same size, andafter the ground plan is produced a second transparent sheet can beplaced over it, and

the elevated roads, for instance, can he upon the second sheet in theposition occupy in the ground plan. When th ous charts which go to make1e pl'eted map have been produced in the man ner described, thetransparent sheets are placed removably one on the other, sothat themarkings on the separate auxiliary sheeis occupy proper positions on theground pian.

A photograph is then taken, preferably upon metal, of what appears uponthe plurality-of superposed charts. The'inetal is then etched in theusual or any'p'referred manner, and a single'plate is thus provided fromwhich the matter contained upon the plurality of transparent sheets canbe reproduced.

It often/occurs that maps are to be used for specific purposes and thatit is desirable to omit therefrom everything except theground plan andthe special designations required to be shown. Thus some maps. only showgood roads on the ground plan, others railroads, others points ofinterest, and so on.

It will be seen that in accordance with my invention these special mapscan be readily reproduced at little expense. 'l't merely requires that aground plan free from all special designations shall be provided, andany desired additional matter can be provided upon separate sheets atlittle expense and the whole photographed upon metal and etched, as hasbeen hereinhefore described. By providing; a series of charts or maps oftransparcni. material capable of being brought into registry withrelation to each other and of being readily removed from contact witheach oihcrl am able to employ a single ground plan and to use a varietyof sheets containing .a variety of information for use therewith, so

that the component parts of the structure may be used over and overagain.

It is obvious that the lowermost auxiliary plate carrying the are u ndplan maybe opaque and a photograph of the complete map taken through thetransparent plates and the printing-plate be reproduced therefrom inthis manner. i

Having described my invention, what I claim, and desire to secure byLetters Patent,

1. A device for use in producing, by photolithography, aprinting-surface for maps or charts, the, comprising a sheet havingthereon a ground-plan map, and a superposed light-transi'nitting sheetcontaining designations so arranged that they may he read in theirproper positions on the ground-plan map, as set forth.

2. A device for use in producing by phoiolithography a printing-surfacefor maps or charts, &c., comprising a sheet having thereon a ground-planmap, and a plurality of light-transmitting sheets each bearing differentcharacters or designations so arranged that they may be read in theirproper positions on the ground-plan map and adapted for conjoint usewith the ground-plan map as set forth.

ED WARD ABERLI.

Witnesses LA Vanna DOBEMUS, FREDERICK STRADE.

